Calculating and type-writing machine.



0. F. LAGANKE & J. A. SMITH. CALCULATING AND TYPE WRITING MACHINE.

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C. P. LAGANKE & J. A. SMITH.

CALCULATING AND TYPE WRITING MACHINE.

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CharlasEJZ/a G. F. LAGANKE & J. A. SMITH.

CALCULATING AND-TYPE WRITING MACHINE.

APPLIUATION FILED AUG.25,1902 1,070,142, Patented Aug. 12, 1913.

9 SHEETS-SHEET 4.

G. P. LAGANKE & J. A. SMITH.

CALCULATING AND TYPE WRITING MACHINE.

APPLICATION FILED 11116.25, 1902.

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JohwA Smib/L G, F. LAGA'NKE &J. A. SMITH. CALCULATING AND TYPE WRITING MACHINE.

APPLICATION PI LED AUG. 25, 1902.

Patented Aug. 12, 1913.

9 SHEETS -SHEBT 6.

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JkwA 5% 5m G. F. LAGANKE & J. A. SMITH.

CALCULATING AND TYPE WRITING MACHINE.

APPLICATION FILED AUG. 25, 1902.

Patented Aug. 12, 1913.

9 SHEBTSSHEBT B.

sFLagan/ze, uA.Smit]z/ 8W G. F. LAGANKE & I. A. SMITH.

CALCULATING AND TYPE WRITING MACHINE.

APPLICATION FILED AUG; 25, 1902.

1,070,142. Patented Aug. 12,1913.

9 SHEETS-SHIIBT Q- UNITED STATES PATENT OFFICE.

CHARLES FREDERICK LAGANKE AND JOHN ASBURY SMITH, OF CLEVELAND, OHIO, ASSIGNORS', BY MESNE ASSIGNMENTS," TO ELLIOTT-FISHER COMPANY, A CORPORA- TION or DELAWAR CALCULATING- .AND TYPE-WRITING. MACHINE.

Specification of Letters Patent.

Application filed August 25, 1902. Serial No. 120,925..

To allwhom 2'2. may concern:

Be it known that we, CHARLES F. LAGANKE and JOHN A. SMITH, citizens of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented new and useful Improvements in Calculating and Type-lVriting Machines, of which the following is a specification.

This invention relates to a novel calculating machine, and also to acombined calculating and typewriting machine, in which the calculating mechanism is included as an adj unctive organization.

One object of the invent-ion is to produce a simple, durable and accurately-operating computing device for making certain computations mechanically.

Another object of the invention is to equip a traveling carriage with the actuating member of the computing mechanism, and with operating mechanism, as for instance keys, for moving the actuator to operate the computing mechanism, and for effecting the automatic advance of the carriage to change the relation between the actuator and the elements of the computing device. v

Another object of the invention is to proride, in a key-operated computing device, means for eliminating inaccuracies in the computation, resulting from a false stroke of a key.

ii further object is to secure the lightest possible touch in a key-operated computing device, by means of a power -multiplying connection between the key and the number wheels, (or their equivalents) and by utilizing the full stroke of the key in connection with devices for securing a variable leverage during the transmission of movement.

ii. further object of the invention is to provide a positive lock for the elements of the computing mechanism, and automatically-operated means for-unlocking said elements prior to their reactuation.

A further object is to efiectthe automatic unlocking of the number wheels through the relative movement of the computing device proper and the element supporting the actuator.

A further object is to equip a traveling carriage with number printing mechanism operated by the keys, which likewise serve to rotate a master wheel, or other actuator,

mounted on the carriage and arranged to be advanced by the-movement ofsaid carriage into operative relation with the several number wheels of thecomputing device.

A further object of the invention, considered as a combined calculating and typewriting machine, isto causethe registration of the result of a computation'mechanically effected by the depression of the typewriter keys, as, for instance, the registration of the total amount of a series of consecutive numbers printed by the machine in the usual manner, so that when said numbers have been printed, the operator may ascertain the result .or total without making mental calculations and with absolute assurance of the accuracy of the computation.

A further object of the invention, con-. sidered in a still ,,more specific aspect, is to equip a typewriting machine of that class known as flat-platen or book typewriters, with an automatic computing device or register, for the registration of totals when the machine is employed for tabulating, the device being so arranged that the calculation and consequent registration will embrace 7 only those numbers printed in predetermined column or in predetermined columns.

1%. still further object of the invention is to adjustably mount the computing device proper upon the frame of a fiat-platen machine, to facilitate its being arranged in apposition to any desired column of a worksheet resting on the platen, and to mount the actuator or master wheel on the traveling carriage, so that the advance or the carriage will present the-master wheel to the computing device,-and feed it step by step to p the several number wheels thereof, thus insurlng the movement of the number wheel corresponding in order to the order or point of the column ill Which a given numeral is printed.

A further object is to provide automatically operated means for connecting the operating keys of the machine with the actuator when the latter is broughtinto coincidence with the computing device, and for disconnecting the keys from said actuator when the latter moves out of coincidence with said device, whereby the keys are relieved of any burden incident to the move=' ment of any part of the computing mecha-. nism, except when writing such numbers as Patented Aug. 12,1913.

. locating plate.

on the line 19-19 of Fig. 16. Figs. 20 and are designed to be embraced in the computation.

Another object is to arrange for the total disconnection of the keys from the computing device or its connections, to permit the unrestricted, independent use of the typewriting machine when desired.

Other objects subordinate to those enumerated will appear during the course of the succeeding description of the illustrated embodiment of the invention.

In the accompanying drawings, Figure 1 is a plan view of our combined typewriting and computing machine, portions of the machine frame and carriage being broken away. Fig. 2 is a sectional view on the line 22 of Fig. 1, with certain parts in elevation and others broken'away. Fig. 3 is a sectional View on the line 3-3 of Fig. 2. Fig. 4: is a sectional view similar to Fig. 2, with'the computing device proper omitted, and with the parts positioned as they appear at the end of a complete stroke of a key. Fig. 5 is a detail perspective view of the actuator yoke. Fig. 6 isa-detail view of themaster 'wheel locking lever and 'arm. Fig. 7 is a similar view of the actuator plunger guide and dog. Fig. 7 is a detail view .of the spring for the actuator plunger dog. Fig. 8 is a detail pers ective view of the actuator plunger. Fig. is a detailed elevation of the master wheel, the rack lever and a portion of the plunger, together with the mountings of these parts. Fig. 10 is a de-- tail view of the rock-shaft and cam for.

raising the actuator yoke to disconnect the keys from the computing mechanism. Fig. 11' is a detail perspective view of the rockshaft and cam for automatically controlling the connection between the keys and the computing mechanism. Fig. 12 is a vertical transverse'sectional view through the computing device or register.- Fig. 13 is a side elevation of the register with partsbroken away, the retracted position of the unlocking frame and of its operating lever being shown in dotted lines. Figs. 14 and 15 are horizontal sectional views on the lines 1414 and 151 5 of Fig. 16. Figs. 16 and 17 are vertical sectional views through the front portion of the register, showing the parts thereofin different positions. Fig. 18 is a detail perspective view of the front end of a Fig. 19 is a sectional view 21 are detail perspective views of adjacent number wheels. Fig. 22 is a detail view of a number wheel locking dog. Fig. 23 is a detailview of atransfer cam. Fig. 24 is plate detached. 7 Fig. 26 is a similar view of, the resettlng head. Fig. 27 is a detail view of the retracting lever for the unlocking frame. Fig. 28 is a detail view in plan of the front end of the unlocking frame and the unlocking cam movable with the carriage-to retract the frame, certain positions of the parts being shown in dotted lines. Fig. 29 is a perspective View of the unlocking cam. Fig. 30 is a similar view of the cam plate. Fig. 31 is a detail view on a somewhat enlarged scale, showing the cam .plate in an inverted position. Fig. 32 is a detail sectional view on the lme 3232 of Fig. 1, and Fig. 33 is a view showing a modification of the connection between a key lever and the yoke.

Like characters of reference are employed to designate corresponding partsthroughout the several views.

' It has been stated that the invention relates to a calculating or computing machine, and as the description proceeds it will be seen that viewed solely as such, the device embraces certain novel features which facilitate its operation and insure absolute accuracy of the computation. The computing device has, however, been designed with special reference to the equipment of typewriting machines, and more particularly machines of that type characterized by a flat platen, and a traveling carriage movable both longitudinally and transversely of the platen and carrying printing 'mechanism, including both letter and numeral types. While, therefore, the invention embraces printing mechanism. The upper portion of L the carriage 4 is in the form of a casing 5, within which are mounted the. key levers, having connection with the keys disposed above the casing, and downwardly-striking type-bars, located below the casing, as is well understood in the art. The carriage 4 is drawn to the right by carriage tapes 6,

. and its stepby step advance in the direction of letter spacing is .permitted by the operat1on' of carriage-feeding mechanism 7, includlng pivoted feed yokes 7 one at least of which is moved to operate the carriage 'esc apement when any one of the several keys iscompletely depressed. The carriage-feed ing mechanism 7 is'ijndicated in Figs. 1, 2 and 3 of the-drawings, and the purpose of swans calling attention .to it m connection with r l by a pair of brackets 9, bolted or otherwise rigidly secured to the rear carriage guide 3 and extended upwardly to dispose the bar 8 substantially in the horizontal plane of the top of the casin'g'5. The guide bar is preferably of dove-tailcross-sectional contour,

and engages a correspondingly formed guide groove 10 in the base 11 of the register casing 12. (See Fig. 2.) The register casing contains the computing and registering mechanism to be hereinafter described, and is adjust-able along the bar 8 to dispose said mechanism opposite the column to be totalized. In the illustrated construction, the

retention of the re 'ister casin in its adjusted positions is efi'ected by means of a thumb screw 13, screwed into one side of the base 11 and impinging against a bearingstrip imposed against the adjacent face of the'bar 8. (See Fig. 2;)

lhe computing and registering mechanism, within the register casing 12, is specifically novel, and will be hereater described in detail. For the present, however, it is suflicient to call attention to the fact that this mechanism comprehends, as is usual in this class of devices, a series of registering wheels 0:, F), c, d, e, f, g, 72, and '5, designed to register hundredths, tenths, units, tens, hundreds, thousands, ten thousands, hundred thousands and millions, the tenths and units wheels 5 and 0 being spaced apart sufficiently to provide an intermediate decimal space. Each of these wheels is provided upon its periphery with the digits, Qto 9 inclusive, preferably formed in or upon the end faces of peripheral teeth, one digit of each wheel being observable through a sight opening 14 in the downwardly-curved front end of the top wall 15 of the-register casing; Each of the registering wheels is arranged to make nine-tenths of a complete revolution inde pendently of the other wheels of the series,

to present its digits successively before the l sight opening, and during its last increment of movement engages the adjacent wheel at the left androtates it a-single increment or step, after which the first-named wheel may again rotate independently for nine-tenths of a complete rotation before again advanc ing the adjacent wheel at the left a single step; Since thewheels of the entire series are related to one another in the .m anner stated, it follows that mechanical computations in addition. ma-y be eflfected by moving the wheels, corresponding in order to the order of the numerals composing the numbers to be added, .a number ofzvincrements corresponding to the unitary values of such numerals, Thus, suppose it is desired to add 432 and 234:,theciphers of all of the wheels being disposed opposite the sight opening 14:. The wheel of "the third order, to-wit the wheel a, will be rotated four increments, presenting the numeral 4 at the sight opening; the wheel a? of the second order will be rotated three increments and the wheel 0' of the first order two increments or steps.

will now read-e32, correspondingtothe first number. The second number-234 will .now be added by imparting to the third order wheel 6 two additional increments of movement, to the second order wheel 03 three increments and to the first order wheel 0 four increments, thus causing. the, numerals presented before the sight opening to read 666, the sum of the two numbers. merical value of each order is 10, and since each wheel during its last increment of movement will, as heretofore explained, im-

parta single increment of movement to the next adjacent wheel to the left, it follows that when the number registered reaches the limit of the numerical value of agiven order, the rotation of the adjacent wheel will efiect the registration of a numeral of the next higher order. Thus, assuming the first order or unit wheel 0 to have been given nine increments of movement, causing the pres- The we numerals exposed before the sight opening- Since the nu- 1 entation of the numeral 9 before the sight opening, the next or tenth increment of movement will present the G on said wheel before the sight opening, and by the automatic engagement of the wheel 0 with the wheel 03' of the second order, the latter wheel will be moved a single increment to present the numeral 1 of the second order before the sight opening, the presentation of-the two digits 0 and l in the first and second orders efiecting the registration of the number 10.

The mechanism contained in what we have termed the register casing constitutes the computing or adding device proper, and is that part of the computing mechanism which is mounted independently of the carriage. Upon thecarriage is mounted another portion of the computing mechanism, to-wit, actuating mechanism presentable to the number wheels in succession by the step-by-step advance of the carriage, and designed to ro- ,tate said wheels in proportion to'the nu merical value of the numerals embraced by f the computation. In other words, the actuating mechanism movable with the carriage is designed-to effect the difierential .move-- .ment of the cmnputingj device. this ar rangement is one of the novel characteristics of the invention viewed as a calculating machine, since the traveling carriage supporting the operating mechanism for the number wheels is not necessarily the carriage of a typewriting machine. It is contemplated, however, to utilize a key-operated number wheel actuator, and although it is not essential that thesekeys be arranged to operate the printing devices, the illustrated embodiment of the invention comprehends the utilization of the numeral keys of the typewriter as operating means for the actuator.

Having a general understanding of the arrangement and mode of-operation of the registering or computing mechanism proper, we may now consider the arrangement of the actuator for the number wheels, and the mechanism for effecting an operative connection between the actuator and the numeral keys of the typewriter, it being understood thatthe combined typewrit-ing and computing machine to be specifically described is intended to print a series of numbers, as well as to compute and register. the total ofthe numbers recorded.

The arrangement of the key levers within the casing 5 is such that the levers 1, 2*, 3 4, etc., of the numeral or digit keys are disposed in substantially the same horizontal plane, (see Fig. 3) and are fulcrumed intermediate of their front and rear ends, to which the keys and draw-wires are connected, as shown in Fig. 2.

Located within the casing 5 above the key levers and fulcrumed at its ends upon uprights 16, is a swinging actuator yoke 17, (see Figs. 1 to 5) to which are adjustably secured a series of contact/plates 18, each located directly above a numeral key lever,

and designed to be engaged by the latter to swing the yoke. Each of the numeral key levers is intended to effect the rotation of a registering wheel 'to an eXte-ntcor'responding to the numerical value printed, and since theyoke-17 is a motion transmitting element common to the several numeral keys, these contact plates are graduated in order that the several numeral key levers will effect different degrees of movement of the yoke., These contact plates are susc'ep-' tible of various modifications, since any/ be efiective.

character of connection which would cause the yoke to swing in different degree under the impulse of the various key levers would The desired end could be accomplished' by merely'disposing the lower or contacting edge "of the yoke at an inclination, or by employing depending contact plates of different lengths, mounted upon either the yoke or the levers. In this event, however, a considerable portion of the movement of each key lever would be lost, to-wit, that initial movement of the lever necessary to bring it into contact with to their fulcrums. key is depressed one of the key levers will the under edge of its contact plate. It. is

desirable-to utilize the full stroke of each numeral key lever for the actuation of the yoke. We therefore prefer to employ convertical port-ions 18 and from these heels,

which are disposed at graduated distances from the levers, the end portions 18 of the plates extend forwardly into contact with the upper edges of the key levers adjacent See Fig. 2. When a be swung in an obvious manner, and being in contact with" the end of a contact plate will immediately impart movement to the.

yoke. The angular relation of the horizontal portion of each contact plate with respect to its key lever is such that prior to the completion of the movement of the key lever, the latter will contact with the heel of the plate, and therefore while the complete stroke of each key lever will beutilized in the operation of the yoke, the positions" of the graduated heels will determine the degree of movement of the yoke under the impulse of each key. This character of connection between the key levers and the yoke results in a considerable gain of leverage and prevents the weight of the yoke from be ing suddenly imposed upon the key levers during the depression of the keys. Furthermore, it will be noted that by the time the levers are brought into contact with the heels of the contact-plates, after which there is obviously a decrease of leverage, the inertia of the yoke and its connected parts, including the actuator and one-of the number wheels of the computing device, will have been overcome. This materially improves the touch. a

Upstanding from the bottom of the casing 5 are a pair of parallel plates 21, secured in any suitable manner and constituting a plunger guide, within which is mounted for vertical reciprocation a plunger 22, designed to befoperated by the yoke and arranged in turn to swing a rack lever 23, mounted above the casing and geared in a manner to be described to the masterwheel or actuator 24 of the computing mechanism. At the lower end of the plunger 22 is formed an angular arm 25, carrying an anti-friction ter thereof. (See-Fig.2.) When the yoke ls-elevated by the depression of a key, the

plunger will be raised in an obvious manone side face of the plunger.

emme her, and will be dogged by a pivoted plunger dpg 28, mounted on the plunger guide and dlsposed to engage a rack' 29, formed in (See Fig. 8.) It should be noted at this point that if a key is partially depressed'and then released, it will effect" the partial elevation of the plunger, which, however, will not drop back, but will remain in its partially elevated position, so that if the key is again struck for the purpose of. rectifying the,

false or incomplete stroke, the movement of the plunger, and consequently of the rack lever and actuator, will be only such movement as would have been imparted to these elements had the key been properly depressed in the first instance.

At the end'of the dog 28 opposite its rackengaging beak 30, is formed a tail piece 31, and at an intermediate point is formed a projection 32,, (see Fig. 3) engaged by a spring 33, which serves to retain the dog in either its engaged or disengaged position. While one of the objec ts of this construction is to prevent the retraction of the plunger before the latter has completed its movement, it is necessary to provide for its retraction after it has been properly operated by the complete depression of a key. For this reason we mount upon one side of the plunger guide a lever 34, having its front end 35 located in the path of that yoke 7 of the carriage-feeding mechanism, which is operated to eifect the letter spacing of the carriage upon the complete depression of one of the numeral keys. This relation of parts is clearly shown in Fig. 2 of the drawings, whereinone of the numeral key stems is shown provided with a pin 7*, disposed above the yoke 7 which is in turn disposed above the front end of the lever 34.

Upon the lever 34 is formed an'upstanding releasing finger 36, which, when the lever is swung by the yoke 7 will contact with the tail piece 31;ofthe dog to disengage the latter from the rack. 29, and thus permit the plunger to descend to its normal position. During the descent of the plunger the dog will be held out of engagement therewith by the spring 33, but upon the complete retraction or descent of said plunger, a projection 37, located at. the upper end thereof, will contact with the dog to restore the engagement thereof with the rack, so that upon the next upward movement of the plunger it will be dogged in the manner described. It will be noted that the relation of the front end of the lever 34 to the j "signed to be engaged by a pawl 49, carried yoke 7 is such that thelever will not be moved until immediately prior to the complete depression of the key. Therefore, the lever will not be moved until a completely effective movement of the actuator has been assured. That is to say, the described relation of these parts is such that the lever I re 34 will not be movedto release the dog from the plunger, nor will the yoke 7 a be moved sufiiciently to operate the carriage-feeding mechanism, unless the key is completely clepressed. Should a key be given a false stroke, the master wheel or actuator would be given a corresponding rotary movement and retained by the dogging of the plunger. As the false stroke would be insufficient to operate the carriagefeeding mechanism, the

-master wheel would still remain opposite riage one letter space, to position the mas er wheel opposite the number wheel of next lower order. 7

Besides its function as a plunger-releasing device, the lever 34 constitutes an actuator for a swinging locking or checking arm 38, mounted above the casing and arranged to engage the master wheel or actuator 24, for the purpose of preventing undue movement of the latter. The arm 38 is pivotally connected at a point adjacent to its axis with the upper end of a link 39, having its lower extremity connected-to the rear end of the lever 34. Thus, when said-lever is operated by the yoke 7 in the manner heretofore described, it not only effects the release of the dog from the plunger, but also swings the arm 38 into engagement with the master wheel, as shown in Fig. 4, thereby preventing the momentum of the master wheel from urging it beyond: the proper point, which would obviously result in an exaggerated movement of the engaged number wheel.

The actuating or rack lever 23 is fillcrumed on a short horizontal shaft 40, supported by posts 41, constituting elements of a supporting frame, the base plate 42 of which is bolted or otherwise secured to the top of the casing 5 at the rear sidethereof, the front end of said plate being preferably supported directly over the plates 21 constituting the plunger guide. At the rear end of the-lever 23 is formed a segmental rack 43, meshing with a pinion 44, formed upon or rigidly attached to a-sh'ort horizontal sleeve 45, mounted to rotate upon a short shaft 46, extending between posts 47 upby the master wheel 24 and urged toward the ratchet wheel by a spring 50.

The master wheel 24 is mounted upon the shaft 46 beyond one end of the sleeve 45, and is intended,as heretofore explained, to

meshwith successive registering wheels as puting mec the'carriageis advanced in the direction of letter spacing. Reverse rotation of the master wheel is prevented by a pawl 51, preferably mounted engaging a ratchet disk 52, fixed to the master wheel and having its teeth disposed oppositely to the teeth of the ratchet wheel 4:8.

The depression of one of the numeral or digit keys of the typewriter efiects more or less elevation of the yoke and plunger through the swinging of a key lever, and the consequent elevationof the rear end of the rack lever 23, engaged by the plunger, will depress the segmental rack 4:3, as indicated by the arrow in Fig. 2. Thedepression of the rack will rot-ate the pinion 4.4:, and the ratchet wheel l8 moving with said pinion will enga "e the pawl v4:9 to rotate the master wheel, an thereby impart movement to one of the registering wheels, the extent of such movement corresponding of course to the movement impartedto the yoke by the particular key lever actuated.

It has been'stated that the minimizing of the load im osed upon the keys by the comanism, is a material consideration, and we haveseen that with this' end in wow a peculiar character of shifting connection has been providedbetween the key levers and the actuator yoke. Attention 'is now directed to a connection'of similar character between the plunger and the. rack lever 23, with the same end in view; At theupper end of the plunger 22 islocated a horizontal head 53, providedat its front end with a comparatlvely small anti-friction roller 54, arranged to engage thefront end of the lever 23, and atits rear end with a larger roller 55, which after predetermined movement of the plunger and lever contacts with the latter adjacent to its fulcrum. Thus, during the initial movement of the parts a considerable leverage is secured, and

the shifting of the connection from one en to the other ofthe head 53', does not occur until the inertia of the parts has been overcome. For. the purpose of succinct definition, it may be said that the connection be.-

tween the keys and the actuator is variable,

and includes means for varying the leverage exerted upon the actuator by the keys. For

the same purpose it may also be said that the connection between the keys and the actuator includesmeans independent of the keys for preventing exaggerated movement of the actuator when a key is given a false or insufficient stroke and is subsequently depressed the proper distance.

For the. purpose of retracting the rack. lever 23 and the combined locking; and -'re-.

leasing lever 34, suitable vsprings"56 and 57 are provided. Thev touch isv further =-im-,

proved by the provision which has been made for substantlally counterbalancing the upon one of the posts 47 and actuator yoke 17 and theplunger 22, the lower end of which latter, as heretofore explained, rests upon the plate 27 fixed to the yoke. The present embodiment of the coun-' terbal'ancingmeans comprises one or more springs 58, secured at their lower'ends, as, for instance, to the uprights 16, and hearing at-their upper ends against the 'under side of the yoke, as shown in Figs. 2 and 4.

Notwithstanding the fact that the peculiar character of connection between the keys and the actuator reduces to a minimum the resistance opposed to the depression of the keys, it is nevertheless desirable to provide means for automatically removing the ele- 'ments of the computing mechanism and its operating connections entirely out of operative relation with the" keys and he levers whenever the actuator moves out o coincidence with the computing mechanism proper, and for reestablishing the operative connection between the keys and the actuator whenever the latter arrives in position to operate a number wheel. Various devices for accomplishing this end might be employed, but by preference a rock-shaft 59 is journaled in a sleeve-bearing 60 at the rear end of the casing, and is provided at its opposite ends with a'yoke-elevatingcam 61 and a trip arm 62. 'The cam 61 is disposed to engage the under side of a fixed part of the yoke 17 as, for instance, the

horizontal portion of an angular plate 63 secured thereto. Encircling the rock-shaft is a spring 64, secured at its opposite ends to the sleeve 60 and the cam 61, respectively, and tending constantly to urge the cam in a direction to elevate the yoke 17, for the purposeof removing the operating connections of the computing device entirely out .of the aths of movement of the key levers. The on arm 62, located at the rear end of the sha 59 is mounted loosely thereon adjacent to one side face of a head 65' fixed dto the shaft and provided with a ledge 66 opposed to one end of the arm 62. This ledge constitutes a stop, limiting the movementof the arm 62 relative to the shaft 59 in one direction, but such independent movement of the arm in the opposite direction is permitted by I the rounding of one corner thereof, as indicated at 67. (See Fig; 11.) The retention .of the arm in .its normal position is insured by a spring 68, secured at one end to the head and bearing against one side of the arm. When the re 'ster casing, thatli's to say, when the printing point of the machinev .is located either in advance of or. beyond the column -master wheel is not located opposite the ever will be opposed by the computing mech-.

anism tothe numeral 'keys when thelatter.

are depressed for the purpose of printing numbers other than those embraced within the desired computation. When, however, the advance of the carriage brings the master wheel adjacent to what in the present embodiment of the..computing mechanism may be called the totalizer, the upper end of the trip arm 62 is brought into contact with a trip flange 69, preferably depending from the front of the register casing. (See Fig. 2.) As the carriage continues to advance the trip arm will. be swung back, and as its independent movement is prevented by the ledge 66, the rock-shaft will be rotated and the cam 61 turned down to a horizontal position, for the purpose of restoring the operative relation between the actuator yoke 17 and the key levers by the time the master wheel moves into operative relation with the number wheel of highest order. This relation of the parts will be maintained while the master wheel is traversing the series of number wheels, because the trip arm will be in engagement with. the bottom wall of the flange 69, and will not pass therebeyond until the master wheel has wheel of lowest order.

moved out of coincidence with the number When, however, the master wheel has moved beyond the totalizer, and the trip arm has moved beyond the flange by reason of the step-by-step advance of the carriage, the spring 6st will restore the yoke-elevating cam 61 to its normal position to again relieve the numeral key levers of any unnecessary burden. During the retraction of the carriage to begin a new line of writing, the trip arm 62 will again contact with the trip flange 69, but instead of rocking the shaft 59 as before, will rock independently of the shaft in opposition to the spring 68, which latter will restore the arm to its normal upright positi on when the flange has been passed. Thus the machine may be said to comprehend a computing device, an actuator therefor, a series of keys normally out of operative relation with the actuator, a traveling carriage, and means for automatically eflecting an operative relation between the keys and the actuator when the latter is presented to the computing device during the advance of the carriage. V

In addition to the automatic means for elevating and depressing the yoke 17, we provide a second yoke-elevating cam 70, opposed to the under side of the yoke, preferably at one end thereof, and mounted upon a manuallypperated rock-shaft 71, journaled in a bearing sleeve 72 and extended through one end of the casing 5, beyond which it is provided with a knurled head 3; The cam constitutes manually-operated means for totally disconnecting the keys from the computing mechanism when it is not desired to utilize the latter.

It will be noted that the outer end of the cam 70 is flattened so that when the cam is turned to an upright position the engage- .operative connection to be established between the computing device and the keys, the shaft 'i'l, key 73, and cam 70, constitute means including a key for rendering the automatic key connecting mechanism ineffective, since when the yoke 17 is held elevated by the cam 70, the automatic mechanism, including the structure shown in Fig. 11, will be ineffective to establish an operative relation between the register and the numeral keys.

Before proceeding with the specific construction of the totalizer or computing device proper, we will consider briefly the operation of the mechanism thus far described.

It is well understood by those skilled in the art that type-writing machines of the class under consideration are employed largely for making out bills or statements, and for general tabulating purposes. In

work of this character, more or less matter is type-written upon the worksheet, and numbers are arranged in one or more columns. When the matter to be written has been entered, the machine is shifted, and

stopped (by What are known as tabulator' stops) in proper position to print in a given column. It is for the purpose of mechanicallyncomputing the total of the numbers printed man given column, that the present form of computing and registering mechanism is provided. 7 It is therefore designed to effect the actuation of the registering device only when the numeral keys are depressed for the purpose of printing in the column. Assuming now that a bill is to be made out, the work-sheet is properly positioned upon the platen and the computing device or totalizer is shifted along the guide bar 8, and fixed in position to have its number wheels engaged by the master wheel mounted on the carriage, when said carriage is moved to a position to print in the column to be totalized. That is to say, the register is so adjustedthat when the printing point of the carriage is in position to print a numeral of the seventh order, to-wit, millions, in the column, the master wheel will be in mesh with the number wheel of correspond ing order, to-wit, i. The totalizer having been positioned, the machine will be operated in the usual manner to print any desired digit upon the bill to the left of the column, the operating connections of the actuator opposing no resistance whatever to the depression of the numeral keys, for the reason that the yoke 17 is held in its elevated position by the cam 61. As the carriage advances step-by-step to the right and approaches the column to be totalized, the trip arm 62 will engage the tri flange 69, and as the carriage is further a vanced to bring the master wheel into coincidence with the number wheel 71 of highest order, the rockshaft 59 is rocked to depress the cam 61, and thus lower the'yoke 17 to establish an operative connection between the contact plates and the numeral key levers. If in this position of the carriage, a key is depressed to print a numeral of the millions order, the wheel i-will be rotated a distance proportionate to the unitary value of the numeral printed. Thus, if the 2 key is depressed the key lever 2 will be oscillated, and being in engagement with the front end of one of the contact plates 18 will elevate the yoke 17 and with .it the plunger 22. The elevation of the plunger will swing the rack lever 23, the depression of whose rack will rotate the master wheel, which, being in mesh with the I number wheel 6, will rotate the latter two increments, causing the registration of the digit 2 in the order corresponding to the order in which the same numeral is printed in the column. During the initial depression of the key, great leverage will be exerted by it, because the yoke will be connected to the key leverplosely adjacent to the fulcrum of the latter, andthe'rack lever. willbe connected at a comparatively great distance from its fulcrum with the upper end of the plunger. As the downward movement of the key continues, the connections referred to will beshifted by the contact of-the key lever with the heel of the contact plate, and by the engagement of the rack lever with the antifriction roller 52 at therear end 'of'the plunger head 53. This shifting of the connections will c'ause a decrease of the leverage exerted by the key, but the shock incident to such decrease will be minimized, if not entirely eliminated, by

reason of the impetus gained by the parts. As the key moves down, the pin 7 thereof will contact with the yoke 7 5 of the carriagefeeding mechanism, and, oscillating the yoke in a manner well understood in the art, will.

bring it finally into contactwith the front end of a lever 34. The lever will thus be swung just as the key reaches its completely depressed position, I and will present. the checking or locking arm 38 to the master wheel, to prevent the overrunning 0f the latter under the impetus gained during the stroke of the rack lever. Theswinging of the lever 34 by the yoke 7 in addition to presenting the arm 38 to the master wheel, will bring the releasing finger 36 into contactwith thertail piece of the plunger dog 28, thus disengaging thedog from the plunadvance the carriage ger to permit the gravitation of the latter when the pressure has been removed from the key. Upon the release of the key the yoke 7 will return to its normal posltion, causing the carriage feeding mechamsm to .the distance of one letter space, and releasing the lever 34, to permit its retraction and the consequent movement of the arm 38 out of engagement with the master wheel, and the removal of the releasing finger 36 from the tail piece of thedog. At the same time, the yoke and the plunger will drop back to their depressed positions, which will permit the retraction of the lever 23 without effecting any movement whatever of the master wheel, and will bring the projection 37 at the upper end of the plunger into contact with the beak of the dog, for the purpose of restoring an engaging relation between the dog and the plunger preliminary to a repetition of the described operation. In the event of a false stroke of a key, the incomplete depression of the latter will elevate the yoke and plunger, and thus operate the master wheel and the adjacent number wheel to an extent corresponding to the depression of the key. When the key is released the plunger will not be retracted, but will be dogged in its elevated position, and the carriage will not advance but will retain the master wheelin engagement with the number wheel which has been insufficiently rotated. The reason for this is that the movement of the key will not be sufficient to completely depress the yoke 7 of the carriage-feeding mechanism, and the latter will not therefore effect the advance of the carriage, nor will the lever 34 be operated to release the dog. The failure of the carriage to advance willapprise the operator that a false stroke has been made, and upon the key being restruck in the proper manner it will merely complete the predetermined movement ofthe number wheel, by the elevation of the plunger beyond the pointto which it has already been moved. The utility of the mechanism for do'ggingthe plunger will now be apparent, as it will be seen that if the plunger were permitted to return after having moved the number wheel under theimpulse of a false stroke, it would subsequently add to such false movement of the wheel a movement corresponding to the full, value of the numeral printed. Such .exaggerated movement of the number wheel would necessarily result in an inaccurate computation. Having printed and registered 2, and having by such operation caused the advance of the carriage one letter space, the master wheel will be presented to the number wheel of next lower order, in correspondence with the shifting of the printing point ofthe machine to the point of next lower order in the column. If now a numeral key is suificiently depressed, another number will be printed and registered, and the machine will .be again advanced in the manner described, it being obvious that if a O is printed the registering mechanism will not be operated, because the key lever of the 0 key is never operatively related to the yoke 17. The carriage and master wheel will nevertheless be shifted in such case, for the purpose of maintaining the correspondence between the number wheels and the printing point. As the machine continues to advance to the right the master wheel will finally pass beyond the series of number wheels, and the trip arm 62 will-pass from under the flange 69. As soon as this occurs the yoke 17 will be thrown up automatically, as heretofore explained, to relieve the key levers of any burden during the operation of the machine to print upon the work-sheet beyond the column. When the end of the line is reached the carriage is retracted or drawn back to the left in the usual manner, the arm 62 rocking loosely on the shaft 59, to permit it to pass under the flange 69 withoutdropping the yoke.

It should be noted at this point that one of the characteristic features of the illustrated embodiment of our invention includes a computing device, adjustable independently to enable it to be positioned in proper correspondence with a column to be totalized, and also includes a traveling carriage, supporting actuating mechanism for the totalizer or computer and designed by its movement to present said actuating mechanism to the number wheel corresponding in order to the position of the printing point of the typewriting machine.

The device has been fully described and its operation explained without reference to the specific construction of the totalizer or computing device per 86, because it is evident that the primary objects of the invention may be attained by the employment of any character of computing mechanism, provided itincludes a series of registering wheels, or their equivalents, and means whereby the complete rotation of any wheel will be accompanied by a single increment of movement of the adjacent wheel of higher order. Nevertheless, the invention comprehends ina subordinate aspect thereof the employmentof novel computing mechanism, positive in action and simple and durable in construction, and this mechanism we shall now proceed .to describe in detail.

Within alined openings in the side walls of the casing 12, are located bearing collars 74 and 75, within which is journaled the number wheel shaft 76, rotatably support. ing the several number wheels. (See Fig 12.) This shaft is normally stationary, and upon it are fixed a series of substantiall disk-shaped transfer cams 77, one of whic is located. within the recessed side face of "each wheel, with the exception of the wheel Each wheel, with this exception, is provided, upon the bottom face 78 of its recess, with a pivoted transfer pawl 79, (see Figs. 12, 16, 17 and 21) having. a tail-piece 80, urged outwardly by a flat spring 81 and formed at its opposite end with a beak 82. The major portion of each transfer cam is concentric with the shaft 76, but between the opposite ends of this plain portion 83 of the cam is formed a depression8 l, at one end of which is defined an angular resetting notch 86. The relation of each transfer pawl to its cam when the wheel carryingthe pawl is registering 0, is shown in Fig. 16. Assuming the wheel shown in this figure to be the wheel 9', to the right of the wheel f with which the actuating wheel is engaged, it will be seen that the rotation of the latter in the direction of the arrow will cause the beak 82 of its transfer pawl (shownin dotted lines) to ride upon the plain face 83 of the cam during eight increments of movement of the wheel, that is to say, while the numbers 1 to 8 are successively presented before the sightopening. At the end of the eighth increment of movement, the beak will the next or ninth increment of movement (which presents the digit 9 of the wheel f to the sight opening) the beak of the pawl will travel down into the depression 8% of the cam to engage a tooth of a ratchet wheel 87, formed (as shown in dotted lines) upon the adjacent side face of the number wheel 57 of next higher order. Thus, an engagement will be efiected between the two wheels, (see Fig. 17) so that as. the final increment of movement is imparted to the wheel 7", a corresponding increment of movement will be imparted to the wheel of next higher drop into the resetting notch 86, and during order, to-wit, the wheel 9'. The springs 81 I are employed for the purpose of holding the beaks of the transfer pawls against the edges of the cams, but the positive engagement'of each pawl with a tooth of the adjacentratchet wheel at the proper time, is effected by a slight swell or projection 88, formed on each transfer cam adjacent to the resetting notch thereof. 7 (See Figs. 17 and 23.) As the beak of the pawl approaches the depression84 of the cam, its tail piece rides upon the projection 88, which positively swings the beak of the pawl into the depression to engage the tooth of the adja cent ratchetdisk as the pawl advances.

It will be noted by reference to Figs. 16 and 17, that the transfer cams are of greater diameter than the ratchet wheels 87 except where said cams are depressed to provide therefore appear that durin the last incre-l ment of movement of the w eel f, the beak of its .pawl will be moving up one inclined side of the depression, and Wlll thus be disengaged from the tooth of the ratchet wheel before the next increment of movement of the wheel f is commenced. By reason of this relation of the parts, each cam will serve to hold the pawl of its wheel out of engagement with the ratchet disk of the adjacent wheel, except during the tenth increment of movement, so that each wheel Wlll have independent movement for nine-tenths ofeach complete rotation, and will have cooperative engagement with the next ad acent wheel to the left during the final tenth of each rotation.

For the'purpose of locating the registering wheels with accuracy, so that the digits will always be disposed in exact alinement before the sight opening 14:, we provide what may be termed locating plates 89, disposed to. slide in suitable guideways 90, formed in horizontal guide plates 91, secured rigidly within the casing 12. (See Figs, 16,

- l7 and 19.) @ne of these plates is provided for each number wheel, and each plate is formed at its front end with a pair of pallets 92 and 93, which engage the teeth of the adjacent number wheel in a manner to locate the latter accurately in proper position and to hold it until positively rotated by the master wheel or by the adjacent number wheel. 'lhefunction of these plates 89 will be clear when it is considered that the transfer pawl engaging a tooth of an adjacent wheel must move entirely out of contact with said tooth by the time the wheel carrying the pawl completes its revolution. It is therefore clear that unless locating means other than the pawl is provided, the final movement of the wheel, to which motion is communicated by the pawl, would be uncertain, by reason of the precarious engagement between the pawl and the tooth at suchtime, and there would be some consequent uncertainty as to the accurate location of the driven wheel. The locating plates are therefore so constructed that after the pawl of what may be termed a driving wheel positively moves the engaged or driven wheel a givendistance, said, driven wheel will be moved positively by its locating plate independently of the pawl, so that while both wheels will be positively located, the edgeof the engaged tooth wi l have entirely disappeared within the edge of the cam by the -time'the movement of the pawl is completed.

I .By reference to Fig. '17, it willbe seen that when the beak of a pawl is in engagement with the tooth of the adjacent wheeland .is ready to propel the latter, the pallets 92 and 93 will be in engagement with the teeth of the wheel to be driven, to hold it in position until positively actuated. If now the driven before the latter has reached the end of its increment of movement, and while the pawl is still in engagement with the ratchet tooth, the upper corner of one of the peripheral teeth of the driven wheel (-see .90, Fig. 16) will pass the point of the pallet 93 and will -be presented to an inclined impulse face 95, formed on the pallet. The impulse face 95,

being inclined with respect to the direction of movement of the locating plate, will, as said plate is urged toward the wheel, compel the downward movement of the engaged tooth a sufficient distance to accurately locate the wheel, and to cause the ratchet tooth thereof to be entirely disengaged from the beak of the pawl and to be withdrawn within the edge of the cam disk. When the plate 89 has finally come to rest after locating the wheel, the upper and lower pallets 92 and 93 will be in engagement with the teeth of the wheel, as shown in Fig. 17, to hold said wheel in its properly located position.

'lhe locating plates just described will tend with more or less efi'ectiveness to hold "the number wheels, and to prevent overrunning or exaggerated movement of any wheel operated from a wheel being driven by the actuator. It is found, however, that any retaining device which depends upon a spring or the like to urge it into its locking position is not efi'ective at all times. For instance, if a number wheel is registering 3, and is again operated by the depression of the 9 key, it will rotate at highfs'peed for nine increments, or nine-tenths of a complete revolution. During the seventh increment of this movement its transfer pawl w 1ll pick up the adjacent wheel to the left, movlng said wheel with such speed that the action of a spring-urged locking element would be too tardy to arrest and lock the wheel in time to prevent the impetus gained thereby from effecting its exaggerated movement. Of course a spring of great power would perhaps effect the proper locking of "of the number wheels. In view of these considerations we have devised positively-opwheels. This mechanism includes a series a of locking. dogs ,96, one for each of the erated locking mechanism for the number I- of the trip plate brings it into the path of of locating the wheel.

movement of a trippin 100, extending laterally from a tooth of the wheel of lower order. In the present embodiment of the invention, each trip pin extends from that tooth of the number wheel which bears the digit 4, in order that said pin will engage the trip plate of a dog during the movement, of the wheel carrying the pin, from 9 to 0. We have already seen that the movement of any number wheel from 9 to 0 will be accompanied by a single increment of the adjacent wheel of higher order, and it will now be observed that since the trip pin 100 engages the trip plate of a dog during this same interval, the result will be that when any wheelmeves from 9 to 0, it will advance the adjacent wheel, and will at the same time operate the dog of said wheel to vlock it positively when its single increment of movement has been completed... Thiswill be clear by reference to Figs. 16 and 1. In 1 lg. if? the wheel about to be advanced one increment by the wheel f, whose transfer pawl is shown in dotted lines. As the wheel f advances under the impulse of the master wheel, its pawl will pick up and ad'- vance the wheel 9, and its trip pin' 100 will engage the trip plate 99 of the dog 96, serving the wheel g, so that the dog will be rocked against'the resistance of the spring 98, and will have its rear end thrown up to its engaging position, as shown in Fig. 16. This movement will occur just as. the impulse face 95 of the locating plate of the wheel 9 is about to advance for the purpose Vance of the locating plate will assure thp complete movement of the wheel 9; and the dog will prevent excessive movement there-- of, one tooth of the wheel being rigidly retained between the engaging end of the dog and the impulse face of the locating plate. It should be noted at this point that as the dog is swung to itsv engaging position, the

trip pin which has imparted positive movement to it will pass over and beyond the trip plate to the position indicated in Fig. 16. At this time the wheel carrying the pin, as for instance the wheel 9, will-be registering 0, and may therefore be again rotated nine-tenths of a complete revolution before coming into contact -with the trip Therefore, the ad' ;plate of the dog, in the event that said dog and a shoulder formed on the plunger, respectively. When the dogs are in their unlocked positions, as indicated in Fig. 17, they are disposed to hold the plungers in their retracted positions, but immediately upon the movement of a' dog to its engaging position, its plunger moves forward to ena dog and thus prevents its retract-ion when the trip pin moves beyond the plate. As the number wheels are operated in succession during the travel of the carriage in the direction of letter spacing, such of said number wheels as are advanced by transferred movement will be positively locked by the dogs and will remain locked during the advance of the carriage, since it is evident that no number wheel can be twice operated by movement transferred to itfromanother number wheel during a single travel of the actuator across the totalize'r. It is necessary, however, to unlock the number wheels before another numb-er is added to that already registered, since it would otherwise be impossible to rotate the wheels by either transterred movement or by the direct action of the masterwheel. Many ways of accomplishing the desired end might be suggested, since the simple retraction of the dog-retaining plungers l01 would permit the springs 98 to instantly retract the dogs. We prefer, however, to provide automatically operated means for unlocking the number wheels upon the retraction of the carriage. The illustrated embodiment of the unlocking mechanism comprehends the employment of an unlocking frame 104, mounted to slide in horizontal guide grooves 105 formed in the sides of the casing, and engaging at its rear end a series of pins 106, depending from the plungers. The pins 106 are received at their lower ends within guide grooves 107, designed to prevent their lateral displacement. The unlocking frame 104 is of light open form, and is provided at its front end with a vertical flange 108, at the-lower edge of which is located a horizontal ledge 109. (See Figs. 2, 13, 16, 17, 28 and 29.) By moving the unlocking frame rearwardly' to the position indicated in Fig. 17, and in bearing at its ends against one of the guides .gage the under side of the elevated end of 

